CN108136514B - Clava and cutting element - Google Patents
Clava and cutting element Download PDFInfo
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- CN108136514B CN108136514B CN201680056048.1A CN201680056048A CN108136514B CN 108136514 B CN108136514 B CN 108136514B CN 201680056048 A CN201680056048 A CN 201680056048A CN 108136514 B CN108136514 B CN 108136514B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Drilling Tools (AREA)
- Powder Metallurgy (AREA)
Abstract
It is made of the superhard alloy containing WC particle and Co and there is the elongated clava of first end and the second end in length direction, first end has the first central portion positioned at the center of width direction, the second end has the second central portion positioned at the center of width direction, the content of the Co of first central portion is fewer than the content of the Co of the second central portion, and in the measurement of the average KAM value of the WC particle measured with EBSD method, the average KAM value of the first central portion is smaller than the average KAM value of the second central portion.
Description
Technical field
The present invention relates to the cutting elements such as clava and drill bit (drill), slotting cutter (end mill).
Background technique
Elongated clava is used as structuring.For example, the base being made of the clava of elongated cylindrical shape
Expect (blank), becomes the cutting element of drill bit and slotting cutter etc. by carrying out sword processing.The brill used in aperture processing
Head, it is well known that having the entirety of the cutting edge for being located at top and the chip removal groove (flute) extended since cutting edge
Formula drill bit (soild drill).Drill bit is for example processed for the aperture of the substrate of electronic component to be installed.As claval one
Example discloses different in radial direction or length direction by forming in Japanese Unexamined Patent Publication 2012-526664 bulletin (patent document 1)
Blank.
In recent years, there is the demand for more improving wear resistance and the resistance to property lost for blank.
Summary of the invention
A technical solution of the invention, to be made of the superhard alloy containing WC (tungsten carbide) particle and Co (cobalt), and
Length direction has the elongated clava of first end and the second end, wherein the first end, which has, is located at width side
To center the first central portion, the second end have positioned at width direction center the second central portion, described first
The content of the Co of central portion is fewer than the content of the Co of second central portion, and has electronics in the WC particle to use
Electron backscatter diffraction (the Electron BackScatter that the scanning electron microscope of back scattering diffraction imaging system carries out
Diffraction:EBSD) average KAM (the Kernel Average Misorientation: kernel balanced orientation of method measurement
Difference) value measurement in, the average KAM value of first central portion is smaller than the average KAM value of second central portion.
Detailed description of the invention
Fig. 1 is made of Figure 1A to 1D.Figure 1A is the side view about the blank of claval an example as present embodiment
Figure.Figure 1B shows the figure of the content distribution of the Co in the blank of Figure 1A.Fig. 1 C is the content point for showing the Cr in the blank of Figure 1A
The figure of cloth.Fig. 1 D is the figure for showing the content distribution of the V in the blank of Figure 1A.
Fig. 2 is made of Fig. 2A and 2B.Fig. 2A is the side view of the variation of the blank about Figure 1A, and Fig. 2 B is to show Fig. 2A
Blank in Co content distribution figure.
Fig. 3 be for for Fig. 1 blank manufacturing method an example illustrate mold structure schematic diagram.
Fig. 4 is the side view of an example of the drill bit about present embodiment.
Specific embodiment
About clava, will be described as follows with reference to the accompanying drawings.The cutting element of present embodiment blank (hereinafter referred to as base
Material is claval an example.Figure 1A is the side view of blank, and Figure 1B to 1D is respectively the content for showing the Co in blank, Cr (chromium)
Content, the content of V (vanadium) distribution figure.The part being represented by dotted lines in Fig. 1 is the skiver for indicating to be formed using blank
An example of tool.
Blank 2 used in the drill bit 1 of Fig. 1 of an example as cutting element is by the superhard alloy containing WC and Co
The elongated cylindrical shape constituted, and have in length direction positioned at the end (being denoted as end A below) and position of first end side
In the end (being denoted as end B below) of second end side.When the blank 2 of present embodiment is used for drill bit 1, it is being located at first
The end (being denoted as end X below) of end side forms cutting edge 5, the end B of blank 2 and the second end side positioned at drill bit 1
The shank (shank) 3 of end (being denoted as end Y below) engages.Blank 2 can be spliced directly to shank 3, can also be via other components
It is bonded to shank 3.
In the present embodiment, cutting edge 5 is formed by grinding the end A of blank 2, so the end A ratio of blank 2 bores
The end X of first 1 formation cutting edge 5 more leans on first end side.
According to the present embodiment, the end A of blank 2 has the first central portion (following note positioned at the center of width direction
There is the second central portion (being denoted as central portion B1 below) positioned at the center of width direction for central portion A1), the end B of blank 2.
Moreover, the content Co of the Co of central portion A1AThe content Co of Co than central portion B1BIt is few.
In other words, in the state of drill bit 1, end X has the central portion positioned at the center of width direction (in being denoted as below
Centre portion X1), the end Y of drill bit has the central portion (being denoted as central portion Y1 below) positioned at the center of width direction.Moreover, central
The content of the Co of portion X1 is fewer than the content of the Co of central portion Y1.
Thereby, it is possible to improve the wear resistance of the end side X with cutting edge 5, and can be improved in drill bit and vertical milling
The resistance to property lost of the end side Y lost is easy in the cutting elements such as knife.
" width direction " in present embodiment refers to the direction vertical with the length direction of blank 2, " the center of width direction
Portion " refers to that length is the position of the half of the length in the direction vertical with the length direction of blank 2, that is, includes the width side of blank 2
To the region at center." content " in present embodiment is not to indicate the value of absolute magnitude, but indicate containing than (quality %)
Value.
In addition, according to the present embodiment, in WC particle to use the scanning for having electron backscatter diffraction imaging system
In the measurement of the average KAM value for electron backscatter diffraction (EBSD) the method measurement that formula electron microscope carries out, central portion A1's is flat
Equal KAM value is smaller than the average KAM value of central portion B1.In other words, in the state of drill bit 1, the average KAM value ratio of central portion X1
The average KAM value of central portion Y1 is small.
It is not easy to extend in the end side A crack (crack) as a result, resistance to tipping (chipping) property improves, and in end
The side B is rigidly improved, and blank 2 is not allowed pliable.Therefore it is made into the end side X by blank 2 with cutting edge 5 and in the end side Y
When cutting element with shank 3, the wear resistance of cutting edge 5 improves and can be improved the rigidity of end B, so can mention
The machining accuracy of high cutting element.
It especially, is 0.5~0.65 ° in the average KAM value of central portion A1, the average KAM value of central portion B1 is 0.75~
In the case where 0.92 °, it can more improve the wear resistance of end A and the rigidity of end B can when forming cutting element
More improve the wear resistance and machining accuracy of cutting edge 5.
Here, " KAM (Kernel Average Misorientation: kernel balanced orientation is poor) " indicates with EBSD
Crystallization between the adjacent measuring point of (Electron Back Scatter Diffraction: electron backscatter diffraction) method measurement
Difference, that is, the local azimuthal in orientation is poor, and KAM value and the size of plastic deformation (plastic cleformation) etc. have correlation.
Because KAM can confirm microcosmic water with the deformation and indexable density of microscopic scale reflection part by the measurement of KAM value
Flat local plastic deformation.Average KAM value is obtained from measuring the KAM value of each position in observation area and being averaged
Value.
In the present embodiment, in the formed body before sintering blank 2 into, the additive amount of the Co of the end side A is made to compare end
The additive amount of the Co of the portion side B is few, and makes a part diffusion of Co in sintering, thus makes the Co's of central portion A1 in blank 2
Content CoAThe content Co of Co than central portion B1BIt is few.Due to make the end side A Co additive amount than the end side B Co addition
Amount is few, so the sintering shrinkage amount of the end side A is different from the sintering shrinkage amount of the end side B.Therefore, it is easy to produce in sintering process
Raw deformation, but can be by controlling sintering condition, to make a part of residual of the WC particle for being present in the end side A and the end side B on one side
There is small plastic deformation, on one side by the control of average KAM value in predetermined range.
The end A of the blank 2 of present embodiment also has the first peripheral part positioned at periphery other than central portion A1
(being denoted as peripheral part A2 below).Peripheral part A2 WC particle average KAM value than the WC particle of central portion A1 average KAM value
In the case where small, in use, can be improved the machining accuracy of cutting edge 5, and extending cutter life as rotary cutter.
Here, " peripheral part A2 ", including the end including periphery of finger ends A and model that average KAM value can be analyzed
It encloses.For example, as long as the measurement region of average KAM value is with following width measurements, that is, in the length side along blank 2
To section in, the width below of the 10% of the width in the direction vertical with length direction.
Also, in terms of the content of Co, in CoAFor 0~10 mass % and CoBIt, can in the case where for 2~16 mass %
The wear resistance of blank 2 and fracture resistance are maintained high.CoAAnd CoBMore preferably range can with processing conditions change and
Variation, but in the case where blank 2 is for example used as the drill bit of printed circuit board processing, as long as making CoAFor 1~4.9 matter
Measure % and CoBFor 5~10 mass %.
In CoBIn the case where for 5 mass % or more, it is easy to densify end B in common uniform composition, is being sintered
The cohesion portion of Co is less prone in blank 2 afterwards.Therefore, the distribution of Co is less prone to non-uniform situation.This is because in CoB
In the case where 5 mass % or more, Co can be spread because of the capillarity of Co, so being less prone to the cohesion portion of Co, and be held
Easily become uniform distribution.Thus, even if in the end side A CoAIt is relatively fewer, it can also become fine and close superhard alloy.
In addition, in CoAWith CoBThe ratio between (CoA/CoB) be 0.2~0.7 when, the hardness of end A can be made to improve, Er Qieneng
Enough improve the resistance to property lost of blank 2.
In addition, if the Co content of peripheral part A2 is defined as CoAO, then this CoAOIn the content than indicating the Co of central portion A1
CoAWhen few, it can improve in the drill bit and the rotary cutters such as slotting cutter in cutting element and be easiest to abrasion in cutting edge 5
The wear resistance of peripheral part A2.
In the present embodiment, blank 2 can also contain Cr element and V element other than WC and Co.In addition, blank 2 is also
Carbide containing periodic table IV, V, VI race metal except W, Cr, V.When blank 2 contains Cr, blank 2 can be improved
Corrosion resistance can be improved heat resistance when containing Co and Cr.In addition, Cr and V are able to suppress the abnormal grain growth of WC particle, so
The high superhard alloy of intensity can steadily be produced.
V is also the ingredient of the crystal grain-growth of WC particle when inhibiting sintering.When in the end side A, the content of V is less, in end A
Side can relatively be difficult to inhibit the crystal grain-growth of WC particle, and the average grain diameter of WC particle can be larger.Thus, in the end side A, superhard conjunction
The wear resistance of gold can improve.On the other hand, when the content of the end side B V is more, the crystalline substance of WC particle can be inhibited in the end side B
Grain growth, and the average grain diameter of WC particle can be smaller.Thus, in the end side B, the intensity of superhard alloy can be got higher, drill bit 1 it is resistance to
The property lost can improve.
The content V of the V of central portion A1AThe content V of V than central portion B1BIt is few.Moreover, blank 2 can have following area
Domain: as from central portion A1 towards central portion B1, the content of Cr is with slope SCrVariation, and the content of V is with slope SVVariation.This
When, in slope SCrCompare slope SVHour, the whole corrosion resistance of blank 2 is good.Moreover, in slope SVCompare slope SCrWhen big, holding
The hardness of the portion side A is high and wear resistance improves, and the high and resistance to property lost improves in the intensity of the end side B.
In addition, end A and end B refer to the end of blank 2, but specifically, refer to pass through EPMA in present embodiment
(Electron Probe X-ray Micro Analyzer: the micro- spy instrument of electronics) analyzes to analyze the range of the composition of blank 2.
When confirming the variation of the composition of length direction of blank 2, each gold of the length direction of confirmation blank 2 is measured by EPMA analysis
Belong to the content distribution of element.In Fig. 1 C and 1D, the end accurately formed can not be measured in the EPMA analysis of blank 2 by being omitted
The record of the measured value in portion.In addition, the distribution that Cr and V is omitted is recorded in Fig. 2.
Indicate the Cr of the content of the Cr of central portion A1AFor the Cr of the content of 0.05~2 mass %, the Cr for indicating central portion B1B
For the V of the content of 0.1~3 mass %, the V for indicating central portion A1AFor the V of the content of 0~1 mass %, the V for indicating central portion B1B
When for 0.05~2 mass %, corrosion resistance, heat resistance and the intensity of blank 2 are high.
Its at least part of Cr can be solid-solubilized in conjunction in phase with metal form, and can be with Cr3C2Or it is answered with other metals
The forms such as carbide are closed to exist.Its at least part of V can be solid-solubilized in conjunction in phase with metal form, and can with VC or and its
The forms such as the double carbide of his metal exist.In addition, V is added to less in conjunction with the solid solution capacity in phase compared with Cr element.?
In present embodiment, CrA、CrBIt is that the content of Cr element is scaled Cr3C2Value afterwards, and VA、VBIt is to change the content of V element
It calculates as the value after VC.
In SCrFor 0~0.1 mass %/mm and SVWhen for 0.1~0.5 mass %/mm, the corrosion resistance of blank 2, heat resistance,
The wear resistance and wear resistance of the end side A, the end side B the resistance to property lost height.
In addition, CoA、CoB、CrA、CrB、VA、VBMeasuring method, can alongst by blank 2 segmentation into two
In the state of, the composition of central portion A1 and central portion B1 is measured by EPMA analysis respectively to be confirmed.Blank 2 from end
The composition analysis of A to end B is measured on the central axis parallel with length direction in section.It is surveyed by EPMA analysis
Determine the Cr content and the distribution of V content of the length direction of blank 2, calculating approaches the overall distribution of blank 2 with least squares method
Slope when straight line, as SCr、SV。
Here, the content ratio of the Cr in the direction vertical with length direction, the peripheral part of blank 2 be located at internally away from
When the content of the Cr of the part of 100 μm of periphery or more is more, the corrosion resistance of blank 2 can be higher.The content of the Cr of so-called peripheral part,
Refer to the content of the Cr in the range of the composition that can be analyzed using EPMA to analyze blank 2 in the periphery.In present embodiment
In, alongst blank 2 to be divided and the corner of the end side A in the section that is formed is as peripheral part A2, measurement
The content of Cr in this peripheral part A2.
In the average grain diameter a of the WC particle of central portion A1AThe average grain diameter a of WC particle than central portion B1BIt, can when big
Improvement hardness is high and is easy to happen the wear resistance of the end A of defect.In addition, because improving the rigidity of end B, clava
It is not pliable.Therefore it is used as blank 2 in the end side A with cutting edge 5 and in skiver of the end side B with shank 3
When tool, the wear resistance of cutting edge 5 and the wear resistance of end A are higher, and the resistance to property lost of end B also can be higher.
The average grain diameter of WC particle can be calculated with LUZEX analytic method according to scanning electron microscope (SEM) photo.?
The following method can be used as the other methods of the average grain diameter of confirmation WC particle.Firstly, it is directed to the section of blank 2, with
Use electron backscattered the spreading out of scanning electron microscope (SEM-EBSD) progress with electron backscatter diffraction imaging system
(EBSD) method is penetrated to observe the orientation direction of WC particle.By confirming the orientation direction of each WC particle, to determine each WC particle
Profile.Then, the area of each WC particle is calculated, then according to the profile of each WC particle the area to be scaled to the diameter of bowlder
As partial size.Then, using the average value of the partial size of each WC particle as average grain diameter.
Here, average grain diameter aAWith average grain diameter aBThe ratio between (aA/aB) be 1.5~4 when, the wear-resisting of the end side A can be made
Damage property and fracture resistance are suitable, and can be improved the resistance to property lost of the end side B.
It in the present embodiment, is following long to the region that the average grain diameter of the WC particle of end A and end B is measured
The region of degree, that is, when observing the tissue of blank 2 by sem analysis, draw the straight line from the first end of blank 2 towards second end,
Straight across the length of 10 or more WC particles.Moreover, the region since first end and second end is made to be no more than stick
The region of the length of the width of shape body.
In the direction vertical with length direction, the average grain diameter a of the WC particle of central portion A1AWidth direction than end A
Peripheral part A2 WC particle average grain diameter aAOWhen big, improved in the fracture resistance of peripheral part A2, and central portion A1's
Rigidity improves.
In addition, peripheral part A2 refers to from the peripheral surface of the end A of blank 2 with a thickness of the width direction of the end A of blank 2
On length 10% region, central portion A1 refers to the center of the width direction of the end A comprising blank 2 and with a thickness of blank 2
End A width 10% region.In addition, in present embodiment, blank 2 alongst will be divided into two halves and
The average grain diameter of corner, that is, peripheral part A2 WC particle of the end side A on the section of formation is defined as aAO。
In addition, in average grain diameter aAIt is 0.3~1.5 μm, average grain diameter aBWhen being 0.1~0.9 μm, the wear resistance of end A
It further increases, and the resistance to property lost of end B further increases.When blank 2 is used for drill bit 1, average grain diameter aAExpectation
Range is 0.4~0.7 μm, average grain diameter aBExpected range be 0.15~0.5 μm.
Blank 2 can be included as from central portion A1 towards central portion B1, the content of Co is with slope S1CoFirstth area of variation
Domain 11；And than first area 11 also than lean on the end side B and as from central portion A1 towards central portion B1, the content of Co is with oblique
Rate S2CoThe second area 12 of variation.At this point, in S1CoCompare S2CoBig situation, can be in the high wear resistance for still maintaining the side end A
Property situation under improve the side end B large-scale toughness, to improve the resistance to property lost of blank 2.
In first area 11, the content of Cr can be with slope S1CrVariation, the content of V can be with slope S1VVariation.In addition,
The content in two regions 12, Cr can be with slope S2CrVariation, the content of V can be with slope S2VVariation.
First area 11 and second area 12 can be confirmed according to the content distribution of the Co of the length direction in blank 2
In the presence of.Also, content, the content of V of first area 11 and the Cr in second area 12 are measured, calculates and to be become with least squares method
Slope when distribution in nearly each region is as S1Co、S1Cr、S1V、S2Co、S2Cr、S2V.In addition, slope is with from central portion A1 direction
The direction that central portion B1 is lower is positive, to be negative from central portion A1 towards the direction that central portion B1 is got higher.
In slope S1CoFor 0.2~1 mass %/mm and S2CoWhen for 0~0.2 mass %/mm, the end side A can be improved
Hardness, and can be improved the resistance to property lost of blank 2.In addition, the slope S in first area 111CoIt can be impermanent in region
It is fixed.Especially, in first area 11, make S1CoIn the case where becoming larger close to the first end for being located at end A, first
The wear resistance at end is high, and the resistance to property lost of blank 2 is higher.
In addition, Co's contained by second area 12 contains when covering diamond coating (not shown) to the surface of blank 2
When amount is few, because the content for harming the Co of the growth of diamond crystallization is seldom, in second area 12, the crystallization of diamond coating
Change degree is got higher, thus the hardness of diamond coating and being tightly engaged into property can improve.
In addition, can have the content of Co with from central portion A1 direction between second area 12 and first area 11
Centre portion B1 is with slope S3CoThe third region 13 of variation.At this point, in slope S3CoCompare slope S2CoWhen big, control first area 11 and
The slope S of second area 121Co、S2CoIt can be easy to, and can more improve resistance to the losing for being easy to happen the end side B lost
Property.If slope S3CoFor 2~50 mass %/mm, then it can both improve the wear resistance of the end side A or improve the folding of the end side B
Damage property.
Fig. 1 D shows the appearance that the content of V element changes in a manner of corresponding to the variation of the content of Co element.That is, scheming
In 1D, the slope S of the V element in first area 111VThan the slope S of the V element in second area 122VGreatly.Moreover, third area
The slope S of V element in domain 133VThan the slope S of the V element in first area 111VGreatly.
On the other hand, in fig. 1 c, the content of Cr element does not correspond to the variation of the content of Co element and changes,
Reason is unknown, but the value of the content in the Cr of adjacent position has big deviation, but generally speaking with small slope variation.
Moreover, as shown in Fig. 2, blank 2 can than first area 11 also than lean on the first end side have Co content with slope
S4CoThe fourth region 14 of variation.At this point, in slope S4CoCompare slope S1CoIn the case where small, the wear resistance of the end side A can be made
High range expands.
In addition, in slope S4CoContent for the Co in 0~0.5 mass %/mm and the fourth region 14 is 0~0.6 matter
When measuring %, when to the surface coated diamond coating of blank 2, because the Co content contained in the fourth region 14 tails off,
The crystallization degree in the surface diamond coating of the fourth region 14 can more be improved.Therefore, the hardness of diamond coating and close
Zygosity can improve.On the boundary of first area 11 and the fourth region 14, the inflection point of Co content distribution may be present.
Assuming that the length of first area 11 is L1, the length of second area 12 is L2, the length in third region 13 is L3,
When the length in four regions 14 is L4, in the case where L1/L2=0.3~3, the hardness of end A can be made to improve, and can mention
The resistance to property lost of high blank 2.In the case where L3/L2=0.01~0.1, second area 12 and the Co's in first area 11 contains
The adjustment of amount can be easy to.In the case where L4/L2=0~0.05, it can more stably promote the cause of the superhard alloy of end A
Densification.It, can when making drill bit 1 in L4/L2 greater than 0.05 and in the case where the fourth region 14 has the part not densified
To grind a part for removing the fourth region 14.
In addition, first area 11, second area 12, third region 13 and the fourth region 14 composition, as long as respectively in base
The central portion of the width direction of material 2 is measured.
The content Co of the Co of the peripheral part of A in endAOThe content Co of the Co of central portion than end AAWhen few, in drill bit and
In the rotary cutters such as slotting cutter, the wear resistance that the peripheral part of abrasion is easiest in cutting edge 5 can be improved.
In Fig. 1,2, blank 2 have be located at than end A also than lean on the protrusion 15 on the outside of length direction.15 shape of protrusion
The shape smaller than end A as diameter.That is, the diameter d of protrusion 15cDiameter d than end AAIt is small.Because protrusion 15 is easy
It is formed, but also can be in the top end part of the drill bit 1 of the formation progress sword processing of protrusion 15, so reducing the wave of processing charges
Take.
As shown in Figure 1, 2, in the case where protrusion 15 is hemispherical, even if blank 2 is arbitrarily put into engagement dress
Blank 2 mutually collides when setting interior, also can inhibit 15 defect of protrusion, and inhibits to damage other blanks 2 because of protrusion 15.?
In present embodiment, from the point of view of cross-sectional view, the root side of protrusion 15 connecting with end A is with the face R (hollows) connection.Cause
This, inhibits the load in the forming of formed body 35 to concentrate on the end of low punch (lower punch) 23 and lead to low punch 23
Defect.
Here, make the diameter d of the end A of blank 2AAnd the diameter d of the end B of blank 2BAll in 2mm hereinafter, and making to grow
When the length for spending direction is L, in L and dAThe ratio between (L/dA) in the case where 3 or more, in blank 2 after sintering, by CoAAnd
CoBScheduled value is adjusted to be easier to.That is, than (L/dA) be big value when, even if in sintering Co spread, also be easy fully
Ensure the Co in blank 2AWith CoBDifference.Than (L/dA) more preferable range be 4~10.
Blank 2 is also possible to the state that do not grind after sintering, but in order to which blank 2 to be bonded in the process of shank 3,
The position precision of the blank 2 when holding blank 2 is provided, the outer peripheral surface of sintered blank 2 can be in the mood for
(centerless) it processes.
In addition, for the preferable size of blank 2, when being used as the drill bit of printed circuit board processing, dA、dBFor
0.2~2mm, length L are 3~20mm.dAMore desirable range be 0.3~1.7mm.In others on the way, also there is dAIt is more than
The case where 2mm, d in this caseAExpected range be 0.2~20mm, L=3~50mm.
In the present embodiment, the drill bit 1 of the aperture processing of printed circuit board is although disclosed for as cutting element,
But the present invention is not limited to this, as long as having elongated body part.For example, can using make intermetallic composite coating drill bit or
Medical drill bit, slotting cutter, internal diameter processing the turnery processings such as discarding formula blade (throw away chip) skiver
Tool.In addition, the clava of blank 2 etc. is other than being used as cutting element, it is also possible to make wear-resistant material, sliding component.Clava
Even if can be also suitably used for being processed as scheduled shape, being fixed by end B in the material or component being used as other than cutting element
In the state of make to include that the region of end A contacts the purposes used with subject material.
(manufacturing method of blank)
Illustrate that production has the method for blank 2 of protrusion 15 below, an example of the method as production blank.Firstly,
The raw material powder of WC powder for making superhard alloy etc. is deployed, which will form blank 2 and cutting element (drill bit
1).In the present embodiment, two kinds of raw material powders are deployed.
That is, allotment: the first raw material powder 30, for making the position comprising the end A where protrusion 15 of blank 2；
And second raw material powder 33, for making the end side B of blank 2.The raw material powder of first raw material powder 30 contains WC powder.
The raw material powder of first raw material powder 30 can also contain Co powder.
Second raw material powder 33 contains WC powder and Co powder as raw material powder.Co powder in first raw material powder 30
Content it is fewer than the content of the Co powder in the second raw material powder 33.The content and second of Co powder in first raw material powder 30
The mass ratio of the content of Co powder in raw material powder 33 is 0~0.5, especially 0~0.3.
First raw material powder 30 and the second raw material powder 33 can also contain Cr other than WC powder3C2Powder, VC powder
Or Co powder.In addition, the first raw material powder 30 and the second raw material powder 33 can contain respectively other than above-mentioned powder
WC、Cr3C2, periodic table Section IV other than VC, V, VI race metal carbide, nitride and carbon nitride powder any addition
Object.
For example, the blending amount that the blending amount of the WC powder in the first raw material powder 30 is 90~100 mass %, Co powder is
0~8 mass %, the total amount of the blending amount of additive are 0~5 mass %.The blending amount of WC powder in second raw material powder 33
Blending amount for 65~95 mass %, Co powder is 5~30 mass %, and the total amount of the blending amount of additive is 0~10 mass %.
In addition, can be by making the average grain diameter of the WC powder in the first raw material powder 30 and the WC powder in the second raw material powder 33
Average grain diameter is different, come adjust sintered blank 2 from end A to the distribution of the Co of end B and other metallic elements,
The characteristics such as hardness and toughness.
Slurry (slurry) is produced by adding binder (binder) and solvent to the powder after above-mentioned allotment.
The slurry is granulated to form particle, forms forming powder.
As shown in figure 3, preparing model forming module (hereinafter referred to as mold) 20, to the compression mod (dies) 21 of mold 20
Die cavity (cavity) 22 in the above-mentioned particle of investment.Then, make upper punch 24 out of, die cavity 22 that devote compression mod 21
The top of particle declines and pressurizes, to produce formed body.In the present embodiment, bottom, that is, low punch 23 of die cavity 22
The upper surface as stamping surface, have and be used to form the recess portion 25 of protrusion 15.
Manufacturing process in present embodiment has: it includes recess portion 25 that the first raw material powder 30, which is devoted in die cavity 22,
Region process；By the process of the second raw material powder 33 investment die cavity 22；Make upper punch 24 is lowered from above to press investment
The process that the laminate of the first raw material powder 30 and the second raw material powder 33 in the die cavity 22 of mold 21 pressurizes；And from
The process that mold 20 takes out the formed body 35 being made of the laminate.
Formed body 35 is cylindrical shape, and the content of the Co of protrusion 15 and end A are fewer than the content of the Co of end B.Cause
And it is easy the content distribution of Co being adjusted to scheduled distribution in blank 2.
In addition, lacking for the protrusion 32 just shaped can be inhibited in formed body 35 when the bottom surface of recess portion 25 is curved surface
Damage, and the content for the Co being able to suppress in the protrusion 15 of sintered blank 2 is uneven, so easily avoiding local
It is sintered bad.In addition, recess portion 25 and protrusion 15 can also be omitted.
In diameter to be obtained in 2mm sintered body below, such as extra duty can be applied to upper punch 24 to make
The position of formed punch 24 declines downwards 0.1~2mm from the holding position of the upper punch 24 when pressurization, i.e., declines formed body downwards
Length 0.1%~20% length, and reduce the load of low punch 23.When molding condition is for example above-mentioned, it can improve and apply
It is added on the uneven of the pressure of formed body 35, so situation damaged when can easily avoid extracting formed body 35, it can
Make the sintered blank 2 of formed body 35 is shaped as scheduled shape.
At this point, as shown in figure 3, the diameter D of 23 side of low punch of formed body 35 can be madeAThan the diameter D of 24 side of upper punchBIt is small.
D the ratio between in present embodimentA/DBExpected range be 0.8~0.99.
Though, can there are for example between the first raw material powder 30 and the second raw material powder 33 in addition, be not particularly illustrated
Other raw material powders such as three raw material powders, that is, the content of the Co powder of third raw material powder is than the Co in the first raw material powder 30
The content of powder is few, and more than the content of the Co powder in the second raw material powder 33.
Formed body after press molding is taken out from mold, after then being burnt 0.5~2 hour with 1300~1500 DEG C, then is made
Receive HIP sintering (sinter-HIP) handle to form blank 2.Sintering temperature is according to the content of Co and WC particle
Average grain diameter adjustment.At this point, in the present embodiment, from 1000 DEG C to the heating rate 4~7 of sintering temperature when making to be sintered
DEG C/min, make 50~200Pa of decompressed pressure of sintering temperature.Moreover, HIP sintering is lower than sintering temperature 5~20
At a temperature of DEG C, handled with the pressure of 5~10MPa.It so, it is possible containing for the Co for being easily adjusted end A and end B
Amount.
In addition, because the agglutinating property of the first raw material powder 30 and the second raw material powder 33 is different, be sintered medial end portions A and
The shrinking percentage of end B is different and deforms formed body, and the shrinking percentage of the shrinkage ratio end A of end B is big.That is, being burnt due to passing through
Knot make end B Co a part to end A spread, so end B than end A also than more shrink.Therefore, the shape of sintered body
Have the diameter of the end B trend smaller than the diameter of end A.
Here, when heating rate is faster than 4 DEG C/min, because the diffusion of the Co in sintering is avoided to carry out excessively,
The difference of the Co concentration in sintered blank 2 can be made to increase, be easy to keep the average KAM value of central portion A1 more flat than central portion B1
Equal KAM value is small.In addition, deciding as circumstances require, also it is easy to make the average grain diameter of central portion A1 than the average grain diameter of central portion B1 sometimes
Greatly.When heating rate is slower than 7 DEG C/min, blank 2 can be made to shrink well, be easy to make the average KAM value ratio of central portion A1
The average KAM value of central portion B1 is small.In addition, deciding as circumstances require, it is relatively easy to make WC particle-dense in end A sometimes.
In addition, decompressed pressure at a sintering temperature is in 50Pa or more, because avoiding diffusing into sintering Co
It is excessively capable, so the difference of the Co concentration in sintered blank 2 can be made to increase, and it is easy to make the average KAM of central portion A1
It is worth smaller than the average KAM value of central portion B1.In decompressed pressure in 200Pa situation below, blank 2 can be made to receive well
Contracting, and be easy to keep the average KAM value of central portion A1 smaller than the average KAM value of central portion B1.Therefore, it is easy to make WC in end A
Son densification.
Furthermore it when the difference of the treatment temperature of HIP sintering and sintering temperature is bigger than 5 DEG C, is easy to make central portion A1's
Average KAM value is smaller than the average KAM value of central portion B1.In addition, deciding as circumstances require, also it is easy to make the average grain of central portion A1 sometimes
Diameter is bigger than the average grain diameter of central portion B1.When the treatment temperature of HIP sintering and the difference of sintering temperature are at 20 DEG C or less,
Blank 2 can be made to shrink well, be easy to keep the average KAM value of central portion A1 smaller than the average KAM value of central portion B1.Therefore,
It is easy to make WC particle-dense in end A.
In addition, the forming process of present embodiment is not limited to the above embodiment revealed die forming, also can
(dry bag pressing) is enough shaped by cold pressure punching press (cold isostatic pressing), dry bag method, is injected into
Shape etc. is formed.
(manufacturing method of cutting element)
Explanation uses the drill bit 1 that printed circuit board processing is manufactured through blank 2 obtained from above-mentioned operation below
An example of method.Firstly, tens or several hundred blanks 2 are arbitrarily put into engagement device.Make blank 2 in engagement device
With the state arrangement of length direction alignment.When with protrusion 15, protrusion 15 is confirmed, using image data etc. with determination
The end A and end B of blank 2.According to definitive result, end A and end B can automatically be made to arrange along certain direction.
Then, after abutting the blank 2 of arrangement with the component being made of shank 3 and neck 7 in addition prepared,
The two is engaged by laser etc..Then, sword processing is carried out to the blank 2 after engagement.At this point, the composition of drill bit 1 such as Fig. 1 institute
Show, end X becomes 5 side of cutting edge of drill bit 1, and end Y becomes 3 side of shank of drill bit 1.
(cutting element)
Sword processing is carried out for above-mentioned blank 2, to produce the cutting elements such as drill bit 1.The drill bit 1 of Fig. 4 through sword by processing
Rear blank (processing department) is bonded to the neck 7 of processing department and 3 structure of shank of the rear end side (upside in Fig. 4) positioned at neck 7
At.Processing department have positioned at end X cutting edge 5 and with the continuous groove 6 of cutting edge 5.Processing department and neck 7 constitute drill body
(body)8.Therefore it can also say that shank 3 is located at the rear end side of drill body 8.
Cutting edge 5 is that have central axis and at first the part contacted with chip being cut part while rotating, and is wanted in performance
High wear resistance and wear resistance are asked.The function that there is groove 6 chip that will be processed and generate to be discharged toward rear, neck 7 is to forgive
Solve the part of diameter mutually different processing department and shank 3.The maximum gauge of processing department is set in such as 2mm or less.3 energy of shank
Enough parts for making for drill bit 1 to be fixed on processing machine.
Though being not particularly illustrated, coating can be formed on the surface of drill bit 1.Coating can for example be enumerated with PVD
TiN, TiCN, TiAlN, diamond, class diamond carbon (diamond like carbon) and the brill to be formed a film with CVD method of method film forming
Stone etc..
The structure of drill bit 1 can be to constitute neck 7 and shank with relatively inexpensive materials such as steel, alloy steel or stainless steels
3, blank 2 is bonded on to the top of neck 7.It is all made of blank 2 in addition it is also possible to which drill bit 1 is whole.Furthermore neck 7 not must
Must, drill bit 1 can be to construct made of directly engaging blank 2 with shank 3.
[embodiment 1]
By metallic cobalt (Co) powder, chromium carbide (Cr3C2) powder, vanadium carbide (VC) powder and remaining average grain diameter be
0.3 μm tungsten carbide (WC) powder, to mix the first raw material powder and the second raw material powder shown in table 1 the ratio between shown in table 1
Mixed-powder.Addition is mixed into binder and solvent and produces slurry in each mixed-powder, then utilizes spray drying
Device (spray dryer) produces 70 μm of average grain diameter of particle.
Prepare the mold shown in Fig. 3 for having 144 through holes.The first raw material powder of table 1 is first put into the mold,
The second raw material powder of table 1 is subsequently filled to carry out die forming.The first raw material powder and second are shaped by die forming
Then the formed body that raw material powder is laminated takes out from mold.At this time, it is assumed that the diameter of low punch side is DA, upper punch side
Diameter be DB, formed body lower part length be HA, formed body top length be HB, then the shape of formed body is as shown in table 1.
It is heated up since 1000 DEG C to formed body with heating rate shown in table 2, and with environment shown in table 2 and burning
After junction temperature is sintered a hour to molding, change to HIP sintering shown in table 2 (being recorded as HIP in table 2) temperature,
And the HIP sintering carried out under the pressure of 5MPa 30 minutes is handled, to obtain blank.
For obtained blank, the diameter (d of its end A, end B are measuredA、dB) and be recorded in table 2.In addition, along length
It spends direction and blank is divided into two halves, measured by EPMA analysis from end A to the content of the Co of end B, the content of Cr, V
Content variation, confirmation first area to the presence or absence of the fourth region, slope, length.It is directed to the end A of blank again, measurement is outer
The content of the Co of circumference.As a result it is illustrated in table 2~5.In addition, measuring central portion A1, peripheral part A2, central portion B1 by EBSD
WC particle average grain diameter.
The measurement of the KAM carried out with EBSD method is implemented in the manner as described below.Firstly, using silica gel (colloidal
Silica after) being polished (buff) grinding to the section of the length direction of blank, Oxford Instruments (Oxford is used
Measurement region is divided by the Instruments) EBSD (electron backscatter diffraction system, model JSM7000F) of company's manufacture
The region (pixel (pixel)) of quadrangle.For each region marked off, from the reflection for the electric wire for being incident to sample surface
Electronics obtains Kikuchi maps (Kikuchi Pattern) to measure the orientation of each pixel (pixel).It is soft using the analysis of JSM7000F
Part analyzes determined orientation, calculates various parameters.
Observation condition are as follows: acceleration voltage 15kV, wide 60 μ m that measurement area is set as the surface of blank is 5 μm deep, adjacent
Pixel between distance (Walk drilling depth cun (step size)) be set as 0.1 μm.By the gun parallax between adjacent pixel at 5 ° or more
The case where be considered as grain boundary.For KAM, calculates a certain pixel in crystal grain and deposited with being less than in the range of grain boundary
Adjacent pixel between gun parallax average value, then measurement constitutes the average value of all pixels of entire measurement area
As average KAM value.In addition, the measurement of above-mentioned average KAM value, is measured for arbitrary three visuals field, it is then flat with it
Mean value is assessed.As a result it is illustrated in table 5.
Then, after the peripheral part to the blank carries out not being in the mood for processing, arbitrarily by investment engagement device in, engaging
The direction that the protrusion of blank is determined in device, is arranged in the same direction for the end A of each blank and end B, makes the end of blank
Portion B is connected to shank and engages with shank, then applies sword processing to the position comprising end A of blank, and produces drill bit.
For obtained drill bit, drilling processing test is carried out with following conditions.As a result it is illustrated in table 5.
(drilling processing test condition)
Chip being cut part: FR4,0.8mm are thick, three pieces overlapping
Borehole shape:
Revolving speed: 160krpm
Feed speed: 3.2m/ minutes
Evaluation item: it is capable of the number (a) of the product of aperture processing and the flank abrasion width (μ of the drill bit after test
m)
[table 1]
[table 2]
[table 3]
[table 4]
[table 5]
From table 1~5 it is found that in CoAWith CoBThe flank abrasion width of identical sample I-14 is big, and sample I-15 is then sintered
Deficiency bores the first hole and initial defect just has occurred.In addition, the average KAM of average the KAM value (A) and central portion B1 of central portion A1
It is worth that (B) identical and the average grain diameter a of the WC particle of central portion A1AWith the average grain diameter a of the WC particle of central portion B1BIdentical examination
Expect I-16~I-22, wear resistance is lower, and hole site precision reduces, and processing number is few.Moreover, sample I-16~I-22 because
The average grain diameter a of the WC particle of central portion A1AWith the average grain diameter a of the WC particle of central portion B1BIt is identical, so flank is worn
Width is larger, and processing number is also less.
In contrast, CoACompare CoBLess and the average KAM value of the central portion A1 sample smaller than the average KAM value of central portion B1
I-1~I-13 and I-23, flank abrasion width is smaller, and it is more to process number.Wherein, especially central portion A1 is averaged
KAM value is 0.50~0.65 °, sample I-1, I-2 and I-7~I-13 that the average KAM value of central portion B1 is 0.75~0.92 °,
It is more to process number.
In addition, the average KAM value (AO) of the WC particle of peripheral part A2 is smaller than the average KAM value of the WC particle of central portion A1
Sample I-1~I-3, I-7~I-13, processing number are more.
In addition, than (CoA/CoB) be 0.2~0.7 sample I-1, I-2, I-7, I-8, I-10~I-13 processing number
It is more.Moreover, the average grain diameter a of central portion A1AAverage grain diameter a than central portion B1BBig sample I-1~I-4, I-6~I-13 and
I-23, flank abrasion width is smaller, and processing number is more.The average grain diameter a of any one sampleAIt is all 0.3~1.5 μ
M, average grain diameter aBIt is all 0.1~0.9 μm.In particular, average grain diameter aAWith average grain diameter aBThe ratio between (aA/aB) be 1.5~4 sample
I-1~I-3, I-7~I-13, processing number are more.
In addition, average grain diameter aAOWith average grain diameter aAThe ratio between (aAO/aA) be 1.1~2 sample I-1~I-4, I-7, I-9,
I-11~I-13, flank abrasion width is small, and it is more to process number.
In addition, sample I-1~I-12 has slope S2CoSecond area and compare slope S2CoBig slope S1CoFirst
Region, flank abrasion width is smaller, and it is more to process number.In particular, slope S1CoFor 0.2~1 mass %/mm, slope S2Co
It is small for sample I-1, I-2, I-6~I-12 flank abrasion width of 0~0.2 mass %/mm.
[embodiment 2]
The formed body of table 6 is produced using raw material powder used in embodiment 1, and is sintered with the condition of table 7.
Then, drill bit is produced using this blank.For obtained drill bit, drilling processing test is carried out with following conditions.As a result
It is illustrated in table 7~10.
(drilling processing test condition)
Chip being cut part: FR4 material, 24 laminates, 3.2mm is thick, and one
Borehole shape:
Revolving speed: 160krpm
Feed speed: 3.2m/ minutes
Evaluation item: it is capable of the number (a) of the product of aperture processing and the flank abrasion width (μ of the drill bit after test
m)
[table 6]
[table 7]
[table 8]
[table 9]
[table 10]
From table 6~10 it is found that CoACompare CoBLess and the average KAM value of central portion A1 is smaller than the average KAM value of central portion B1
Sample II-1~II-4, flank abrasion width is smaller, and it is more to process number.The central portion A1's of sample II-1~II-4 is flat
Equal partial size aAAverage grain diameter a all than central portion B1BGreatly.
[embodiment 3]
The formed body of table 11 is produced using raw material powder used in embodiment 1, and is burnt with the condition of table 12
Knot.Then, drill bit is produced using this blank.For obtained drill bit, drilling processing test is carried out with following conditions.Knot
Fruit is illustrated in table 12~15.
(drilling processing test condition)
Chip being cut part: FP4 material, 0.06mm is thick, 10 overlappings
Borehole shape:
Revolving speed: 300krpm
Feed speed: 1.8m/ minutes
Evaluation item: it is capable of the number (a) of the product of aperture processing and the flank abrasion width (μ of the drill bit after test
m)
[table 11]
[table 12]
1) length-width ratio: the ratio of drill bit blank-end length and diameter dA
[table 13]
[table 14]
[table 15]
From table 11~15 it is found that CoACompare CoBLess and the average KAM value of central portion A1 is smaller than the average KAM value of central portion B1
Sample III-1~III-3, flank abrasion width is smaller, and process number it is more.The central portion of sample III-1~III-3
The average grain diameter a of A1AAverage grain diameter a than central portion B1BGreatly.
Description of symbols
1 drill bit (cutting element)
2 blanks (cutting element blank)
3 shanks
5 cutting edges
6 grooves
7 necks
8 drill bodies
11 first areas
12 second areas
13 third regions
14 the fourth regions
15 protrusions
Claims (13)
1. a kind of clava, to be made of the superhard alloy containing WC particle and Co, and length direction have first end and
The elongated clava of the second end, wherein
The first end has the first central portion positioned at the center of width direction,
The second end has the second central portion positioned at the center of width direction,
The content of the Co of first central portion is fewer than the content of the Co of second central portion,
And in the WC particle to use the scanning electron microscope for having electron backscatter diffraction imaging system to carry out
Electron backscatter diffraction (EBSD) method measurement average KAM value measurement in, the average KAM value of first central portion compares institute
The average KAM value for stating the second central portion is small.
2. clava as described in claim 1, wherein
The first end also has the first peripheral part positioned at periphery,
The average KAM value of first peripheral part is smaller than the average KAM value of the WC particle of first central portion.
3. clava as claimed in claim 1 or 2, wherein the average KAM value of first central portion is 0.50~
0.65 °, the average KAM value of second central portion is 0.75~0.92 °.
4. clava as claimed in claim 2, wherein described in the average grain diameter ratio of the WC particle of first central portion
The average grain diameter of the WC particle of second central portion is big.
5. clava as claimed in claim 4, wherein the average grain diameter of the WC particle of first central portion with it is described
The ratio between average grain diameter of the WC particle of second central portion is 1.5~4.
6. clava as claimed in claim 4, wherein described in the average grain diameter ratio of the WC particle of first peripheral part
The average grain diameter of the WC particle of first central portion is big.
7. clava as claimed in claim 5, wherein described in the average grain diameter ratio of the WC particle of first peripheral part
The average grain diameter of the WC particle of first central portion is big.
8. clava as claimed in claim 6, wherein the average grain diameter of the WC particle of first peripheral part with it is described
The ratio between average grain diameter of the WC particle of first central portion is 1.1~2.
9. clava as claimed in claim 4, wherein the average grain diameter of the WC particle of first central portion is 0.3
~1.5 μm, the average grain diameter of the WC particle of second central portion is 0.1~0.9 μm.
10. the clava as described in any one of claim 1,2,5 to 8, wherein the content of the Co of first central portion with
The ratio between content of Co of second central portion is 0.2~0.7.
11. the clava as described in any one of claim 1,2,5 to 9, wherein the clava is included positioned at described
Two end sides, the second area that the content of the Co is changed with slope S 2Co；And it is located at the first end side, the Co's
The first area that content is changed with slope S 1Co,
The slope S 1Co is bigger than the slope S 2Co.
12. clava as claimed in claim 11, wherein the slope S 1Co is 0.2~1 mass %/mm, the slope
S2Co is less than 0.2 mass %/mm.
13. a kind of cutting element is located at shank to be made of the superhard alloy containing WC particle and Co and having in length direction
The elongated cutting element of the end Y of side and the end X with cutting edge, wherein
The end X has the central portion X1 positioned at the center of width direction,
The end Y has the central portion Y1 positioned at the center of width direction,
The content of the Co of the central portion X1 is fewer than the content of the Co of the central portion Y1,
And in the WC particle to use the scanning electron microscope for having electron backscatter diffraction imaging system to carry out
Electron backscatter diffraction (EBSD) method measurement average KAM value measurement in, described in the average KAM value ratio of the central portion X1
The average KAM value of central portion Y1 is small.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015191537 | 2015-09-29 | ||
| JP2015-191537 | 2015-09-29 | ||
| JP2015-213064 | 2015-10-29 | ||
| JP2015213064 | 2015-10-29 | ||
| PCT/JP2016/078251 WO2017057266A1 (en) | 2015-09-29 | 2016-09-26 | Bar stock and cutting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108136514A CN108136514A (en) | 2018-06-08 |
| CN108136514B true CN108136514B (en) | 2019-08-09 |
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|---|---|
| JP (1) | JP6608945B2 (en) |
| CN (1) | CN108136514B (en) |
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| JP2017217715A (en) * | 2016-06-06 | 2017-12-14 | 住友電工ハードメタル株式会社 | Rod stock, drill tip, rod stock manufacturing method, and drill manufacturing method |
| DE102017112696A1 (en) * | 2017-06-08 | 2018-12-13 | Gühring KG | cutting tool |
| LU100871B1 (en) * | 2018-07-11 | 2020-01-13 | Tungaloy Corp | Coated cutting tool |
| EP3567133A1 (en) * | 2018-05-09 | 2019-11-13 | Tungaloy Corporation | Coated cutting tool |
| JP6748379B2 (en) * | 2018-05-09 | 2020-09-02 | 株式会社タンガロイ | Coated cutting tools |
| JPWO2023176819A1 (en) * | 2022-03-18 | 2023-09-21 |
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2016
- 2016-09-26 WO PCT/JP2016/078251 patent/WO2017057266A1/en active Application Filing
- 2016-09-26 CN CN201680056048.1A patent/CN108136514B/en active Active
- 2016-09-26 JP JP2017543250A patent/JP6608945B2/en active Active
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| JPS62218010A (en) * | 1986-03-19 | 1987-09-25 | Mitsubishi Metal Corp | Carbide drill |
| JP2004114202A (en) * | 2002-09-25 | 2004-04-15 | Sumitomo Electric Ind Ltd | Fine machining tool |
| CN103079733A (en) * | 2010-09-09 | 2013-05-01 | 钴碳化钨硬质合金公司 | Cutting inserts |
| CN103212728A (en) * | 2012-01-23 | 2013-07-24 | 三菱综合材料株式会社 | Surface coating cutting tool provided with rigid coating layer with excellent heat resistance and wear resistance |
| CN104838031A (en) * | 2013-03-25 | 2015-08-12 | 日立金属株式会社 | Intermediate material for stainless steel for knives |
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| TW201718134A (en) | 2017-06-01 |
| CN108136514A (en) | 2018-06-08 |
| TWI619571B (en) | 2018-04-01 |
| WO2017057266A1 (en) | 2017-04-06 |
| JP6608945B2 (en) | 2019-11-20 |
| JPWO2017057266A1 (en) | 2018-07-12 |
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